American socalists see their agenda as a force of equality before anything else: equality as religion. Some believe in their agenda because they refuse to accept the nasty reality of life, and some believe in it because they feel market capitalisim has failed them (not considering that they themselves have failed).
However, they have not really thought about their chances in such a system. Look to other socialist nations. With the exception of cleptocracies, criminal regimes, and some hard core communist countries, performance is still a class filter in governmental systems. They are unprepared for this.
My hypothesis is that many pre enactment proponents of socalisim are basically easy employment seekers. Consider someone who is lobbying for the creation of an agency responsible for the approval of automotive design. As usual, the proponent sees himself as a critical part of this agency. Upon enactment, the same motivator that sent the talented engneers and designers to the auto companies, will now rush to this new bureau and immediately and totally eclipse our hereo who will once again be sent to the back of the line. Ergo, the American proponent of socalisim is happiest when his potential competition for position(job, status, you name it), is busy elsewhere.